Electric water heater



Feb. 18, 1923. 1,445,019. F. JOESCHKE.

ELECTRIC WATER HEATER.

FILED MAYS. 1922.

(1 Fig.4. E O

M?" a" I @WW W aziaru vs.

Patented Feb. 13, 1923.

UNITED STATES PATENT OFFICE.

FRANZ JOESCHKE, O1? BERLIN, GERMANY, ASSIGNOR TO HYDROTHEBM FABRIKELEKTRISCHER APPARATE G. M. B. H., OF BERLIN, GERMANY.

ELECTRIC WATER HEATER.

Application filed May 5,

inn-lip. nany have invented cert v. and us .i. lniproi'cinents in anF717 is ater cat-r2. e"? which the follow s iecification.

This invention relates to water heater-s i id its purpoi'se is toprovide a device which is particularly adapted to be used a faucet inconnection with a water pipe for supplying heated water. The principalobject of the invention is to provide improved means for coi'itrollingthe flow of water through the heating device and for simultaneouslyregulating the circuit of the clerk-- tric heating element, therebypreventing the operation. of the heating apparatus when. water is notflowing through the device. A- further object to provide an improvedarrangement of water circulating channels and heating elements in thebody of the heating device in order to assure a more rapid and efficientheating of the water. Other objects relate to various features ofconstruction and arrangement which will appear more clearly hereinafter.

The nature of the invention will be nu derstood from the followingspecification taken with the accompanying drawings in which. oneembodiment is illustrated. ln the drawings Fig. 1 shows a longitudinalvertical section through the device; Fig. 2 shows a cross section on theline (1 4; of Fig. 1 and Fig. 3 shows a cross section on the line c-d ofFig. 1.

The electric hot water heater of the present invention comprises acasing B having an internal cylindrical chamber closed at its upper endby a cap V. The casing has an auxiliar top portion A which seats on thecasing li and fits over the cap V, these parts being rigidly securedtogether by any means suitable for the purpose. The top casing A isprovided with an internal chamber having a cylindrical opening at oneend to receive a tubular member R. The member R is internally threadedfor connection with a water supply pipe and. this threaded portioncommunicates with a conical passage having mounted therein a taperedcock lug D which is mounted on a shaft 0. acking material W is mountedin a recess in the member R around the shaft 0 at the small end of theplug D, and the plug is main- 1922. Serial No. 558,745.

tained in close frictional engagement with the tapered passage of memberR by the nuts X which are mounted on the shaft 0 The shaft 0 projectsthrough the end of the wall of the upper casing A and has an operatinghandle or wheel Q secured to the extremity thereof. A contact cam orwheel E is secured to the shaft 0 within the chamber of the casing A andthis cam wheel is adapted to control the connection of two spring platesF upon rotation of the shaft. The spring plates are mounted in thecasing B which, like the casing A. is preferably formed of porcelain,and these plates are connected in. the circuit of the heating elementhereinafter described, so that the rotation of the shaft 0 and the cockplug D serves to control the circuit of the heating element.

The cock plug D has an axial passage J leading from the end thereof andcommunieating with a transverse passage K which terminate in an arcuategroove formed in the outer wall of the plug D, as shown par ticularly inFig. 3. When the plug D is in the proper position, the passages J and Kare adapted to form a communication be tween the water inlet pipeconnected to the member R and an inlet passage N which leads downwardlythrough the wall of the member R and through the cap V to coinmunicatefinally with the heating channels S which. are formed in the body memberC located in the chamber of the casing B. The body member C iscylindrical in form and the heating channels S are arranged verticallyand distributed around the central part thereof as shown in Fig. 2. Theadjacent vertical channels are connected alternately at their upper andlower ends by means of cross passages T, thus forming a continuouszigzag passage way through the body member, this passage communlcatingat one end with the inlet passage N, previously referred to. andcommunicating 100 at the other end with the outlet pipe P through whichthe heated water flows. The body member C is mounted within acylindrical sheet of heat-insulating material and circular sheets M ofpacking material are 105 maintained in tight contact with the upper andlOWer ends of the body C by means of pressure plates L which areconnected by a bolt G passing through a hole in the central part of thebody member. The heating 110 passage formed through the body member hasa helical heating element, formed suitable electric resistance wire,mounted therein, and the terminals of ti is heating element areconnected in any suitable manner in an electric circuit which includes:the contact springs l previously described.

In starting the apparatus the handle Q is rotated to the left and when acommunication is firstestablished between the passage K and the inletpassage N, water of normal temperature is discharged through the outletpipe P. Further rotation oi the handle Q1 causes the springs F to bebrought in contact with: each other by the operation oi the cam wheelll) and a circuit is thereby established through the heating element Ywith the result that the water discharged through the pipe P raised inten'iperature. When the communication is first established between thepassage J of the plug D and the inlet tube N, the maximum flow of wateris established through. the heating passages so that when the springs Fare brought into contact by the cam wheel E, the water discharged iromthe heating device is heated only to a n'iedium degree. A continuedrotation of the handle Q, in the same direction results in a gradualincrease in the temperature of tie water discharged, owing to the taperoi the arcuate groove at the outer end of the passage K, whereby thecross sec tion of the opening between the channel. J and the inletpassage N is varied as the plug D is rotated.v When theend of thetapered groove in theplug D arrives at the edge of the inlet passage N,resulting in a complete stoppage of the How of water, the springs F areautomatically separated by the cam wheel E so that operation of theheating element, when no water is flowing through the heating passage,is prevented. The mounting of the body G in a packing of heat insulatingmaterial and the zigzag arrange ment of the heating passagesthercthrough results in the rapid and efficient heating of the water andmakes it possible to construct the apparatus in very compact form sothat it can be conveniently attached to water pipes or faucets alreadyin use.

Although I have shown and described a certain :Eorm oi the invention forthe. purposes of illustration, it will. be understood that it may beconstructed in various other embodiments without departing from thescope of the appended claims.

I claim: I p

i 1 Anelectric water heater comprising a casing, a, cock plug rotativelymounted in said casing, said plug having a passage terminatlng in atapered groove, and a body member having a, heating passagecommunieating with the passage in said plug.

2.,An electric water heater comprising a casing, a tubular membermounted in said casing 'a tapered opening there in, a tapered cock plugrotatively mounted in said opening, said plug having a passage extendinginwardly from the end thereot and then transversely, said tubular memberhav ing an opening in its wall to communicate with the transversepassage 1n said plug,- means for connecting said tubular member with asource of water supply, and heating apparatus communicating with openlngin the wall of said tubular member.

3. An el ctric water heater connnising casing, a tubular member mountedin said casing and having an opening therein, a cock plug mounted insaid opening, a shaft connected to said cock plug, said tubular memberand said plug having passages therethrough, a body member h aving aheating passage communicating with the passage in said tubular member, aheating element mounted in said. heating passage, and means comprising acam wheel mounted on said shaft for controlling the operation of said.heating element.

l. An electric water heater comprising a casing, a horizontal shaftjournalcd in said casing and projecting therefrom, a tubular membermounted in said casing and engaged by said shaft, a cock plug mounted onsaid shaft within said tubular member, a heating body mounted beneathsaid cock plug and having a heating passage therctlu'ough, said tubularmember and said plug having passages adapted to control the How of waterinto said heating passage, a heating element mounted in said heatingpassage, and means actuated by said shaft for controlling the operationof said heating element.

5. An electric water heater comprising a casing, a body member mountedin said casing and having a plurality of vertical passages thereinconnected alternately at opposite ends to form a single continuouszigzag heating passage, an electric heating element mounted in saidheating passage and means for controlling the operation of said heatingelement.

6. An electric water heater comprising a casing, a body member mountedin said casing andhaving a plurality of vertical passages thereinconnected at alternate ends to form a single continuous heating passage,packing plates engaging opposite ends of said body member, pressureplates mounted on the outer sides of said packing plates and meansextending through said body member for connecting said pressure plates.

7. An electric water heater comprising a lower main casing, a heatingbody mounted in said lower casing, and having a heating passagetherethrough, an insulating member extending around said heating body,packing members mounted above and below said heating body, a cap membermounted on said casing over said heating body, an upper easing mountedon said lower casing, means carried by said upper casing for controllingthe flow of water through said heating passage, an electric heatingelement mounted in said heating passage and means carried by said uppercasing for controlling the operation of said heating element.

8. An electric water heater comprising an upper casing, a cock plugmounted in said upper casing, and having a longitudinal passage and across passage therein, a main casing, a heating body mounted in saidmain casing and having a heating passage therein, a helical heatingelement mounted in said heating passage, and a contact switch mountedupon the axle of said cock plug for controlling the flow of currentthrough said heating element.

9. An electric water heater comprising an upper casing, a cock plugmounted in said upper casing, and having a longitudinal passage and across passage therein, said plug having a conical. channel communicatingwith said cross passage and terminating in the periphery of said plug, amain casing, a cylindrical body in said main casing having a pluralityof interconnected heating channels communicating with the cross passageof said cock plug, heating elements mounted in said heating channels,packing plates at the top and bottom ends of said heating body, pressureplates engaglng sald pack ng plates, cont-act springs in said uppercasing and a cam wheel mounted upon the axle of said plug forcontrolling the operation of said. contact springs.

10. An electric water heater comprising an upper casing, a plug in saidupper casing having a longitudinal passage and a cross passageperpendicular to said longitudinal passage, said plug having a conical.channel communicating with said cross passage and terminating in theperiphery of said plug, a. main casing, a cylindrical body in said maincasing comprising a plurality of interconnected heating channelscommunicating with the cross passage of said cock plug, heat ng elementsin said heating channels, packing plates at the upper and lower ends of.said heating body, pressure plates engaging said packing plates forpressing the same against the said heating body, contact springs locatedin said upper casing, a cam wheel mounted upon the axle of said cockplug for controlling the operation of said contact springs, and anoutlet tube communicating with the discharge end of said heatingchannels.

In testimony whereof I aflix my signature.

FRANZ JOESCHKE.

